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采用盆栽籽粒苋实验法,研究接种赤子爱胜蚓和壮伟环毛蚓对公路工程损毁赤红壤肥力修复和植物生长的影响。试验设计4个处理,分别为对照(CK)、接种20条赤子爱胜蚓(20Ef)、接种20条壮伟环毛蚓(20Ar)以及分别接种10条赤子爱胜蚓和壮伟环毛蚓(10Ef+10Ar)。结果表明:接种蚯蚓处理后,籽粒苋株高、茎粗、生物量和植株氮磷钾养分累积量显著高于CK处理(P<0.05)。接种表栖型赤子爱胜蚓较接种内栖型壮伟环毛蚓更能促进籽粒苋植株生长和养分累积,但组合接种效果低于单独接种,呈现出20Ef>20Ar>10Ef+10Ar>CK的趋势。蚯蚓活动有助于土壤有机质的分解和土壤养分的活化,能快速提高土壤供肥能力,利于作物吸收,促进作物生长。蚯蚓对土壤肥力的影响与蚯蚓生态类型、接种地土壤性状关系密切。在土壤修复中,根据不同土壤特征接种不同生态类型蚯蚓和添加适宜有机物非常有必要。
The potted grain amaranth experiment was used to study the effects of Eisenia fetida and Ephedra sinica on the fertility restoration and plant growth of red soil damaged by highway engineering. Four treatments were designed, including CK (CK), inoculation of 20 Eisenia fetidae (20Ef), inoculation of 20 Verticillium dahliae (20Ar) and inoculation of 10 Eisenia foetida (10Ef + 10Ar). The results showed that the plant height, stem diameter, biomass and N, P and K accumulation of amaranth were significantly higher than CK (P <0.05). Inoculation table Euglena gracilis Eustachian can promote the growth and nutrient accumulation of amaranth, but the combined inoculation effect is lower than that of inoculation alone, showing 20Ef> 20Ar> 10Ef + 10Ar> CK trend. Earthworms contribute to the decomposition of soil organic matter and the activation of soil nutrients, which can rapidly increase soil fertility, facilitate crop absorption and promote crop growth. The effects of earthworms on soil fertility were closely related to the earthworm ecological types and the soil properties of inoculation. In soil remediation, it is necessary to inoculate different types of earthworms according to different soil characteristics and to add suitable organic matter.